A power converter includes a first rectifier circuit having a pair of first rectifier circuit output terminals and a second rectifier circuit having a pair of second rectifier circuit output terminals, a snubber circuit comprising a first diode and a first capacitor connected to each other at a first node and connecting the pair of first rectifier circuit output terminals, a second diode and a second capacitor connected to each other at a second node and connecting the pair of second rectifier circuit output terminals, a third diode connecting the first node to one of the pair of second rectifier output terminals, and a fourth diode connecting the second node to one of the pair of first rectifier output terminals.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A power converter comprising: a first rectifier circuit having a pair of first rectifier circuit output terminals and a second rectifier circuit having a pair of second rectifier circuit output terminals; a snubber circuit comprising a first diode and a first capacitor connected to each other at a first node, the first diode and the first capacitor being connected in series and the series connected first diode and first capacitor connect the pair of first rectifier circuit output terminals, a second diode and a second capacitor connected to each other at a second node, the second diode and the second capacitor being connected in series and the series connected second diode and second capacitor connect the pair of second rectifier circuit output terminals, a third diode connecting the first node to a low voltage output of the pair of second rectifier output terminals, and a fourth diode connecting the second node to a high voltage output of the pair of first rectifier output terminals.
2. The power converter of claim 1 , wherein the first capacitor is connected to the one of the pair of first terminals not connected to the third diode and the second capacitor is connected to the one of the pair of second terminals not connected to the fourth diode.
A power converter includes a first capacitor and a second capacitor, each connected to specific terminals of the converter's circuit. The first capacitor is linked to one terminal of a pair of first terminals, which is not connected to a third diode. Similarly, the second capacitor is connected to one terminal of a pair of second terminals, which is not connected to a fourth diode. This configuration ensures proper energy storage and discharge within the converter, optimizing its efficiency and performance. The converter likely operates by managing current flow through these capacitors and diodes to regulate voltage levels, converting input power to a desired output. The arrangement of capacitors and diodes helps minimize losses and improve stability, addressing challenges in power conversion efficiency and reliability. The design may be used in applications requiring precise voltage regulation, such as renewable energy systems, electric vehicle charging, or industrial power supplies. The specific placement of capacitors relative to the diodes ensures balanced operation and reduces stress on components, enhancing the converter's lifespan.
3. The power converter of claim 1 , wherein said snubber circuit further includes a first filter inductor connecting the one of the pair of first terminals not connected to the third diode to a midpoint node, and a second filter inductor connecting the one of the pair of second terminals not connected to the fourth diode to the midpoint node.
A power converter includes a snubber circuit designed to reduce voltage spikes and improve efficiency during switching operations. The snubber circuit comprises a pair of diodes and a pair of capacitors configured to absorb and dissipate transient energy generated during switching transitions. The circuit further includes a first filter inductor connected between one of the first terminals of the snubber circuit and a midpoint node, and a second filter inductor connected between one of the second terminals of the snubber circuit and the same midpoint node. The diodes and capacitors are arranged to clamp voltage spikes, while the filter inductors smooth current transitions, reducing electromagnetic interference and improving converter reliability. This configuration enhances the snubber circuit's ability to manage high-frequency switching transients, particularly in applications requiring fast switching and low-loss operation. The inductors help mitigate ringing and overshoot, ensuring stable operation across varying load conditions. The overall design is suitable for high-efficiency power conversion systems, such as DC-DC converters or inverters, where minimizing switching losses and improving transient response are critical.
4. The power converter of claim 1 , wherein each of the first rectifier circuit and the second rectifier circuit are one of a full bridge rectifier and a center tapped rectifier.
A power converter system includes a first rectifier circuit and a second rectifier circuit, each configured to convert alternating current (AC) input into direct current (DC) output. The rectifier circuits may be implemented as either full bridge rectifiers or center tapped rectifiers. The system further includes a transformer with a primary winding and a secondary winding, where the primary winding is connected to the first rectifier circuit and the secondary winding is connected to the second rectifier circuit. The transformer provides galvanic isolation between the input and output stages. The power converter may also include a control circuit that regulates the output voltage or current based on feedback from the output stage. The rectifier circuits ensure efficient conversion of AC to DC while maintaining isolation and stability. The use of full bridge or center tapped rectifiers allows for flexibility in design, accommodating different input voltage levels and load requirements. This configuration is particularly useful in applications requiring isolated DC power supplies, such as medical devices, industrial equipment, and telecommunications systems. The system ensures reliable power conversion with minimal distortion and high efficiency.
5. The power converter of claim 1 , wherein the each of the first rectifier and the second rectifier comprises a plurality of silicon diodes.
A power converter system includes a first rectifier and a second rectifier, each configured to convert alternating current (AC) to direct current (DC). The system addresses inefficiencies and reliability issues in traditional power conversion by incorporating silicon diodes in both rectifiers. The first rectifier receives an input AC signal and converts it to a DC signal, while the second rectifier further processes the DC signal for output or storage. The use of silicon diodes in both rectifiers ensures robust and efficient conversion, reducing power loss and improving overall system performance. The diodes are arranged to handle high-voltage and high-current applications, providing a stable and reliable conversion process. This design is particularly useful in industrial power supplies, renewable energy systems, and other applications requiring efficient AC-to-DC conversion. The system may also include additional components such as filters or regulators to enhance output quality and stability. The integration of silicon diodes in both rectifiers ensures compatibility with existing power infrastructure while improving energy conversion efficiency.
6. The power converter of claim 1 , wherein each of the first rectifier circuit and the second rectifier circuit rectify currents from transformers driven by a multi-phase power system.
A power converter system includes a first rectifier circuit and a second rectifier circuit, each configured to rectify currents from transformers driven by a multi-phase power system. The system further includes a first DC-DC converter coupled to the first rectifier circuit and a second DC-DC converter coupled to the second rectifier circuit. The outputs of the first and second DC-DC converters are connected to a common DC bus. The system also includes a controller that regulates the DC-DC converters to balance power distribution between the first and second rectifier circuits. The controller monitors the input currents from the multi-phase power system and adjusts the DC-DC converters to ensure stable power delivery to the DC bus. The system is designed to handle high-power applications, such as industrial machinery or renewable energy integration, by efficiently converting and balancing multi-phase AC power into a stable DC output. The use of multiple rectifier circuits and DC-DC converters improves redundancy and reliability, allowing the system to maintain operation even if one rectifier or converter fails. The controller dynamically adjusts the power distribution to optimize efficiency and prevent overloading. This design addresses the challenge of managing power fluctuations in multi-phase systems while ensuring consistent DC output for high-power applications.
7. The power converter of claim 6 in which the multi-phase power system includes drivers that may be selectively operated in either a pulse width modulated mode or a phase shifted bridge mode.
A power converter is designed for use in multi-phase power systems, addressing the need for flexible and efficient power conversion. The system includes drivers that can be selectively operated in either a pulse width modulated (PWM) mode or a phase-shifted bridge (PSB) mode. In PWM mode, the drivers control the switching of power devices to regulate output voltage or current by varying the duty cycle of the switching signals. In PSB mode, the drivers adjust the phase relationship between multiple power stages to achieve similar regulation. The ability to switch between these modes allows the system to optimize performance based on operating conditions, such as load requirements or efficiency demands. The multi-phase architecture enhances reliability and reduces ripple in the output power. This design is particularly useful in applications requiring high power density, such as renewable energy systems, electric vehicle chargers, or industrial power supplies. The converter's adaptability between PWM and PSB modes provides a versatile solution for varying power conversion needs.
8. The power converter of claim 1 , comprising a plurality of pairs of rectifier sections wherein each of the first rectifier circuit and the second rectifier circuit is substantially identical to each other corresponding rectifier section.
A power converter includes a plurality of rectifier sections arranged in pairs, where each pair consists of a first rectifier circuit and a second rectifier circuit. The first and second rectifier circuits in each pair are substantially identical to each other. The power converter is designed to convert input power, such as alternating current (AC) to direct current (DC), with improved efficiency and reliability. The identical rectifier sections ensure balanced operation, reducing power loss and enhancing performance. The converter may include additional components, such as transformers, filters, or control circuits, to manage power flow and regulate output. The use of identical rectifier sections simplifies manufacturing and maintenance while ensuring consistent performance across different pairs. This design is particularly useful in applications requiring high-power conversion, such as industrial machinery, renewable energy systems, or electric vehicle charging stations, where reliability and efficiency are critical. The converter may also include features to handle varying input conditions, such as voltage fluctuations or frequency changes, ensuring stable output power. The identical rectifier sections help maintain symmetry in the conversion process, minimizing distortion and improving overall system stability.
9. The power converter of claim 1 in which each rectifier receives power from at least one transformer that has a primary winding.
A power converter system includes multiple rectifiers, each receiving power from at least one transformer with a primary winding. The system is designed to convert alternating current (AC) power into direct current (DC) power efficiently, addressing challenges in power distribution and conversion, such as voltage regulation, harmonic distortion, and energy loss. The transformers step up or step down the input voltage before it reaches the rectifiers, which then convert the AC to DC. This configuration allows for scalable and modular power conversion, suitable for applications requiring high reliability and efficiency, such as industrial machinery, renewable energy systems, and data centers. The use of multiple transformers ensures redundancy and load balancing, improving system stability and performance. The primary windings of the transformers are connected to an AC power source, while the secondary windings supply the rectifiers. The rectifiers may employ various topologies, such as half-wave, full-wave, or bridge rectifiers, depending on the application requirements. The system may also include control circuitry to regulate output voltage and current, ensuring consistent power delivery. This design enhances power conversion efficiency, reduces electromagnetic interference, and supports high-power applications with minimal energy loss.
10. The power converter of claim 9 in which the voltage across each primary winding is limited by clamping diodes.
A power converter system includes a transformer with multiple primary windings and a secondary winding, where the primary windings are connected to a plurality of switches that control the flow of current through the windings. The system is designed to convert an input voltage to a desired output voltage using the transformer's turns ratio and switching control. The primary windings are arranged in a manner that allows for flexible voltage conversion, and the secondary winding delivers the converted voltage to a load. To prevent excessive voltage spikes during switching transitions, clamping diodes are connected across each primary winding. These diodes limit the voltage across the windings by providing a conductive path when the voltage exceeds a predetermined threshold, thereby protecting the switches and other components from damage. The system may also include additional circuitry for monitoring and controlling the switching operations to ensure efficient and stable power conversion. The use of clamping diodes enhances reliability by mitigating voltage transients, which is particularly important in high-frequency or high-power applications where rapid switching can induce significant voltage fluctuations.
11. The power converter of claim 1 , wherein the first node is a node of an upper portion of the snubber circuit and is connected to a low side of a lower portion of the snubber circuit through the third diode and the node of the lower snubber circuit is connected to a high side of the upper snubber circuit through the fourth diode, and a midpoint node connects a low voltage output of the first rectifier circuit to a high voltage output of the second rectifier circuit.
This invention relates to power converters, specifically focusing on snubber circuits used to manage voltage transients and reduce switching losses. The problem addressed is the need for efficient energy recovery and voltage regulation in power conversion systems, particularly in applications involving high-voltage and high-frequency switching. The power converter includes a snubber circuit divided into upper and lower portions. The upper portion of the snubber circuit is connected to the lower portion through a third diode, while the lower portion is connected back to the upper portion through a fourth diode. This bidirectional connection allows for controlled energy transfer between the two portions. Additionally, a midpoint node links the low-voltage output of a first rectifier circuit to the high-voltage output of a second rectifier circuit, facilitating voltage balancing and energy recovery. The diodes ensure unidirectional current flow, preventing reverse current and improving system efficiency. The configuration optimizes transient suppression and reduces power dissipation, enhancing overall converter performance. This design is particularly useful in high-power applications where minimizing switching losses and maintaining stable voltage levels are critical.
12. A method for reducing voltage spikes in a power converter comprising: recirculating snubber energy through a snubber circuit comprising a first diode and a first capacitor connected to each other at a first node, the first diode and the first capacitor being connected in series and the series connected first diode and first capacitor connecting a pair of first rectifier circuit output terminals, a second diode and a second capacitor connected to each other at a second node, the second diode and the second capacitor being connected in series and the series connected second diode and second capacitor connecting a pair of second rectifier circuit output terminals, a third diode connecting the first node to one of the pair of second rectifier output terminals, and a fourth diode connecting the second node to one of the pair of first rectifier output terminals.
This invention relates to power converters and addresses the problem of voltage spikes, which can damage components and reduce system reliability. The method involves a snubber circuit designed to recirculate energy and suppress voltage transients. The circuit includes two main branches, each with a diode and capacitor connected in series. The first branch connects to a pair of output terminals from a first rectifier circuit, while the second branch connects to a pair of output terminals from a second rectifier circuit. A third diode links the junction of the first branch to one of the second rectifier's output terminals, and a fourth diode links the junction of the second branch to one of the first rectifier's output terminals. This configuration allows energy stored in the snubber capacitors to be recirculated rather than dissipated, reducing voltage spikes and improving efficiency. The diodes ensure unidirectional current flow, preventing reverse energy transfer and maintaining stable operation. The system is particularly useful in high-power applications where voltage transients can cause significant damage.
13. The method of claim 12 , further comprising filtering a voltage between a high-voltage output node and a low-voltage output node using a third capacitor connecting the high voltage output node to a midpoint node and a fourth capacitor connecting the low voltage output node to the midpoint node.
This invention relates to power conversion systems, specifically a method for filtering voltage in a high-voltage output stage. The problem addressed is the need for efficient voltage regulation and noise reduction in high-voltage output circuits, particularly in applications requiring stable and clean power delivery. The method involves a power conversion system with a high-voltage output node and a low-voltage output node. A third capacitor is connected between the high-voltage output node and a midpoint node, while a fourth capacitor is connected between the low-voltage output node and the same midpoint node. This configuration creates a filtering network that reduces voltage fluctuations and noise between the high and low output nodes. The midpoint node serves as a common reference point, allowing the capacitors to balance and stabilize the voltage difference between the output nodes. The filtering technique is particularly useful in high-voltage applications where precise voltage control is critical, such as in industrial power supplies, medical devices, or renewable energy systems. By using the midpoint node as a reference, the system achieves improved voltage regulation and reduced ripple, enhancing overall performance and reliability. The method can be integrated into existing power conversion architectures without requiring significant modifications, making it a practical solution for enhancing voltage stability in high-voltage circuits.
14. The method of claim 12 , wherein the first capacitor and the second capacitor have approximately the same capacitance.
A method for managing electrical energy storage in a system with multiple capacitors is disclosed. The system addresses the challenge of balancing energy distribution and maintaining stable voltage levels across capacitors in electronic circuits, particularly in applications requiring precise power management. The method involves using a first capacitor and a second capacitor, each configured to store electrical energy. A key aspect of the method is that the first and second capacitors have approximately the same capacitance, ensuring uniform energy storage and discharge characteristics. This balance prevents voltage imbalances and improves system efficiency. The method may also include steps for charging and discharging the capacitors in a coordinated manner, such as through a switching mechanism or control circuit, to optimize energy transfer and reduce losses. By maintaining equal capacitance between the capacitors, the system achieves more reliable and predictable performance, which is critical in applications like power supplies, energy harvesting, and voltage regulation circuits. The method may further integrate with additional components, such as inductors or resistors, to enhance functionality. The overall solution provides a robust approach to managing energy storage in systems where capacitor balance is essential for operational stability.
15. the method of claim 12 , wherein the first node is a node of an upper portion of the snubber circuit and is connected to a low side of a lower portion of the snubber circuit through the third diode and the node of the lower snubber circuit is connected to a high side of the upper snubber circuit through the fourth diode, and a midpoint node connects a low voltage output of a first rectifier circuit to a high voltage output of a second rectifier circuit.
This invention relates to snubber circuits used in power electronics to manage voltage transients and energy dissipation. The problem addressed is the efficient handling of transient voltages in circuits with multiple rectifier outputs, particularly where different voltage levels need to be isolated or connected in a controlled manner. The invention describes a snubber circuit with an upper portion and a lower portion, each having distinct nodes. The upper portion's node is connected to the low side of the lower portion through a third diode, while the lower portion's node is connected to the high side of the upper portion through a fourth diode. This bidirectional diode arrangement ensures proper current flow and voltage isolation between the two portions of the snubber circuit. Additionally, a midpoint node links a low-voltage output of a first rectifier circuit to a high-voltage output of a second rectifier circuit, facilitating energy transfer or voltage regulation between these outputs. The diodes prevent reverse current flow, protecting the rectifier circuits from voltage spikes or mismatches. This configuration improves transient suppression and energy efficiency in power conversion systems.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
April 11, 2018
February 1, 2022
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.